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(Model.) 2 Sheets-Sheet 1.

C. E. CHURCH. BJBGTOR.

Patented Jun'e 25, 1889.

N. PETERS Ph 2 Sheets-Sheet 2.

` (Model.)

C. E. CHURCH. BJBGTOR.

No. 405,992. Patented June 25, 1889.

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NITED STATES PATENT OFFICE.

CllARLEb` E. CIllRClfl, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE HANCOCK INSPIRATOR COMPANY, OF SAME PLACE.

EJ ECTOR.l

SPECIFICATION forming part of Letters Patent No. 405,992, dated June 25, 1889.

Application filed July 17,1888. Serial No. 280,200. (Model.)

13e it known that I, CHARLES E. CHURCH, of Boston, in the county of Suffolk, and inthe State ot' Massachusetts, have invented certain new and useful Improvements in Ejectors; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying` drawings, in which- Y Figure l shows a vertical longitudinal section of my improved apparatus; Fig. 2, a detail perspective view showing` apoition of the apl'iaratus-shown in Fig. l, and Fig. 3 shows a modified construction of the apparatus shown in l. Fig. i shows in vertical longitudinal section another modification of thc construction shown in Fig. l..

Letters of like name and kind refer to like parts of the apparatus.

My invention relates to that class ot' jet apparatus known as ejectors or litters, and has `for its object to increase the amount ot fluid delivered therefrom without at the same time impairing the vacuum which the apparatus would otherwise create and maintain, and it consists in the construction and arrangement ot' a supplemental inlet to the combining and delivery tube of the apparatus communicating with the suction-pipe or waterchamber and with the interior of the tube at or near its throat with a valve adapted to permit the How ot' fiuid Yfrom the said chamber to the interior of the tube, but which will prevent reflux of the fiuid from the tube into the water-chamber, and in means provided whereby said valve will close said inlet automatically whenever the pressure within said tube at the point therein where the said inlet communicates therewith is greater than the pressure inthe water-chamber, and which will open automatically when the pressure in the tube is less than the pressure within the said chamber.

In Fig. '1. of the drawings, A is the casing, externally screw-tlu'eaded at its lower end and at C for connection with the delivery and suction pipes, respectively, and internally threaded at its upper end for the bonnet li, (more clearly shown in Fig. 3,) also externally threaded for connection with the steam-space of the boiler. XVithin the casing the usual water-chamber is formed by the partitions l T. Seated in the former and secured by the bonnet is the steamnozzle E, oi' ordinary construction,and in the latter is fitted the lifter combining and delivery tube E l1",madeof two pieces joined nearthe middle by screw-threads, as shown. The bore of the upper portion of the tube F is made convergingl toward the delivery end, and the bore of the lower portion F is made divergent in the same direction. 'ithin said combining and delivery tube, between the convergent ends of its upper and lower portionsfsurrounding the convergent end of the former portion, is an annular valve-chamber G', which communicates with the water-chamber C through the passages ff and the annular groove g, and with the interior of the tube through the space between the adjacent ends of the two portions thereof, said passages f f' being controlled by the automatic annular valve which is seated on the inner end of thelowerportion of the tube F. (More clearly shown in Fig.

In Fig. 23 the steam-nozzle E and the bone of the combining and delivery tube are substantially the same as those of Fig. l; but the casing A and the valve Gare shown somewhat moditied, the tormerhaving, in addition to the partitions l T', a third partition T therein, in which is iitted the upper portion of the cmnbining and delivery tube F, and between which partit-ion and partition T is formed a chamber G', connected with the water-chamber through the aperture g and eonduitf, which conduit is formed in the casing over and partially surrounding the water-chamber, and is controlled by the valve G, seated in the aperture g/ and guided by means of its stem, which tits loosely in the bonnet 7L, screwed into the casing, which c'onstruction affords means whereby easier access to the valve (lv may be had than is afforded by the construction shown in Fig. l.

ln Fig. -t the steam-nozzle E and the lower portion of the combining and delivery tube l1" are shown secured in partitions P and T', respmftively, substantially as in Fig. 3, and the upper portion F is loosely fitted in parti tion T and is provided with an enlargement at its lower end, `forming a valve controlling IOO the longitudinal passages ff, made in the eX- terior of the tube, which passages connect the water-chamber with the chamber G when the pressure in the latter chamber is less than the pressure in the former. Vhen, however, the pressure in chamber G exceeds the pressure in the water-chamber, communication between the chambers through the passagcsff will be cut off by the enlarged lower end of the movable portion F, which will thereby be forced against the valve-seat made therefor in the partition T, as is clearly shown in the drawings, the movement of the tube in the opposite direction being limited by the lugs 7o in such a way that the space between the adjacent ends of the two portions of the combining and delivery tube cannot be entirely closed, a free inlet to the interior of the tube from the water-chamber thus being aiforded whenever the valve-surfaces of the tube and of said partition are not in contact.

I am aware that jet apparatus have been made heretofore having a supplemental inlet to the combining-tube, formed by openings through the tube within the water-chamber to increase their delivery; but in all of such jet apparatus, so far as I am aware, such openings lessen the vacuum which the same tubes would produce if they were made continuous-that is to say,without such openings. For example, I found, by experiments made with tubes similar in form and construction to those shown in Fig. l, that with the valve G in the tube the apparatus produced a vacuum of twentyfive inches, (equivalent to lifting water about twenty-eight feet,) its maximum, with fifty-five pounds steam-pressure, and one of eighteen inches (alift of about twenty feet) with one hundred and thirty pounds steam-pressure, which vacuums are substantially the same that a continuous tube, otherwise of the same internal form and substituted therefor in the apparatus, produced with equal steam-pressures. \Vhen the valve G was removed, the vacuum' at the former pressure was reduced`to twenty-two inches (a lift of about twenty-live feet) and at the latter pressure to eleven inches, (a lift of about twelve feet,) showing that the lifting properties of a continuous combining and delivery tube are obtained by means of this invention, together with all of the advantages due to the supplemental inlet.

The valve G, in the form of apparatus shown in Fig. 3, instead of being automatic in its action may be arranged to be controlled by the attendant-as, for instance, the stem may be lengthened, and a screw thread formed thereon to work in a corresponding thread in the bonnet h, (on which bonnet a stu'l'ling-box should be provided,) and a lever or hand wheel attached thereto. j The valve can then be screwed down on its seat i whenever it is desirable to close the supplemental inlet.'

I claim as new and desire to secure by Letters Patentl. In an ejector, a combining and delivery tube Aprovided at its m'outh with the usual inlet for the admission of fluid from the suction-chamber, and provided also with a supplementary inlet formed by one or more ports communicating with the interior of said tube through one or more openings therein and with the suetionehamber, and a valve to automatically close the said supplementary inlet whenever the pressure within the tube at said openings is greater than the pressure in the suction-chamber, substantially as set forth.

2. In an ejector', a combining and delivery tube provided at its mouth with the usual inlet for the admission of iiuid from the suction-chamber, and provided also with a supplementary inlet formed by one or more ports communicating with the interior of said tube through one or more openings therein and with the suction-chamber, and a valve to close the said supplementary inlet, substantially as set forth.

3. In an ejector, a combining and delivery tube the bore of the combining portion of which converges from its mouth in the direction of the How of the fluid through it, provided at its mouth with the usual inlet for the admission of fluid from the suction-chamber, and provided also with a supplementary inlet formed by one or more ports communicating with the interior of said tube through one or more openings therein at or near its throat and with the suction-chamber, and a valve to automatically close the said supplementary inlet whenever the pressure within the tube at said openings is greater than the pressure in th e s notion-chamber, substantially as set forth.

et. In an ejector, a combining and delivery tube the bore of the combining portion of which converges from its mouth in the direction of the fiow of the fluid through it, provided at its mouth with the usual inlet for the admission of fluid from the suction-chamber, and provided also with a supplementary inlet formed by one or more ports communicating with the interior of said tube through one or more openings therein at or near its throat and with the suction-chamber, and a valve to close the said supplementary inlet, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 22d day of June, 1888.V

CITAS. E. CII URC/H.

NVitn esses:

ELMER I. Hows, ALBERT J. HosLER.

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